Up to now, deforestation has been the primary danger to the Amazon rainforest. But climate change may soon surpass it as the greatest threat, scientists say.

This year's Atlantic hurricane season is shaping up to be fairly typical. NOAA officials have predicted nine to 15 named storms; an average season in the Atlantic produces about a dozen.

During the height of the Cold War, U.S. spy satellites collected secret images as they circled the Earth. Today, those images are helping scientists track the effects of climate change.

Extreme temperatures are setting heat records around the world almost every year. And it will become more and more common, scientists say.

U.S. cities are bracing for another summer of extreme heat, with temperatures already skyrocketing in some places. Scientists are trying to determine if heat waves in the U.S. are caused in part by changes in the Arctic.